Special alloys / UNS N08926
Alloy 926 is a 6% molybdenum, nitrogen-alloyed super-austenitic stainless steel with excellent resistance to pitting and crevice corrosion in seawater and chloride process media.
- UNS N08926
- W.Nr. 1.4529
- Spec ASTM B625
- Density 8.1 g/cm³
Also known as / equivalents
| System | Designation |
|---|---|
| UNS | N08926 |
| W.Nr. | 1.4529 |
| EN | X1NiCrMoCuN25-20-7 |
| Also known as | 1.4529, 6Mo, Incoloy 926 |
Chemical composition
| Element | Min % | Max % |
|---|---|---|
| Ni | 24.0 | 26.0 |
| Cr | 19.0 | 21.0 |
| Mo | 6.0 | 7.0 |
| Cu | 0.5 | 1.5 |
| N | 0.15 | 0.25 |
| C | — | 0.020 |
| Mn | — | 2.00 |
| Si | — | 0.50 |
| P | — | 0.03 |
| S | — | 0.01 |
| Fe | Bal. | — |
Mechanical properties
| Property | Value |
|---|---|
| Tensile strength (min) | 650 MPa (94.3 ksi) |
| Yield strength, 0.2% offset (min) | 295 MPa (42.8 ksi) |
| Elongation in 50 mm (min) | 35 % |
Physical properties
| Property | Metric | Imperial |
|---|---|---|
| Density | 8.1 g/cm³ | 0.293 lb/in³ |
| Magnetic response | Non-magnetic | — |
Available forms & specifications
| Form | Specification | Size range |
|---|---|---|
| Sheets & plates | ASTM B575 (Alloy 59), B625 (926), B688 / A240 (AL-6XN), ASTM F30 (Nilo) | 0.3 mm – 6 mm |
| Pipe & tube | ASTM B619 / B622 (Alloy 59), B673 / B674 / B677 (926), B675 / B676 / B690 (AL-6XN) | 1/8" – 24" NB |
| Bars & rods | ASTM B574 (Alloy 59), B649 (926), B691 (AL-6XN) | 3 mm – 500 mm |
| Flanges & forgings | ASTM B564, B462 | 1/2" – 48" NB (larger on request) |
Corrosion & temperature resistance
Alloy 59, 926 and AL-6XN offer very high pitting and crevice resistance in chloride media; Nilo alloys are chosen for dimensional stability rather than corrosion resistance.
Applications
Alloy 926: Seawater piping, FGD, offshore. Glass-to-metal and ceramic-to-metal seals, lead frames and thermostat bimetals (Nilo); seawater cooling, desalination, FGD and chemical process equipment (59, 926, AL-6XN).
Alloy 926 vs AL-6XN®
| Alloy 926 | AL-6XN® | |
|---|---|---|
| UNS | N08926 | N08367 |
| Key property | 6Mo super-austenitic | 6Mo + high N, seawater grade |
| Typical use | Seawater piping, FGD, offshore | Desalination, pharma, food processing |
| Cr (wt %) | 19.0–21.0 | 20.0–22.0 |
| Ni (wt %) | 24.0–26.0 | 23.5–25.5 |
| Mo (wt %) | 6.0–7.0 | 6.0–7.0 |
| C (wt %) | ≤ 0.020 | ≤ 0.030 |
| Tensile / yield (min, MPa) | 650 / 295 | 655 / 310 |
Frequently asked questions
What is the UNS number of Alloy 926?
Alloy 926 is designated UNS N08926 (W.Nr. 1.4529, EN X1NiCrMoCuN25-20-7).
What is Alloy 926 used for?
6Mo super-austenitic. Typical uses: seawater piping, fgd, offshore.
Is Alloy 926 magnetic?
Non-magnetic.
In which forms can I buy Alloy 926 from Rajkamal Metals?
Coils & Strips, Sheets & Plates, Pipes & Tubes, Round Bars & Rods, Flanges, Buttweld Fittings, Socket Weld & Threaded Fittings. Sizes as per standard; other sizes on request.
Do you supply a Mill Test Certificate with Alloy 926?
Yes. Actual values are given in the Mill Test Certificate (EN 10204 3.1) supplied with each order.
What is the difference between Alloy 926 and AL-6XN®?
Alloy 926: 6mo super-austenitic. AL-6XN®: 6mo + high n, seawater grade. See the comparison table on this page.
Last updated: 30 October 2026. Grade names identify the supply range; designations are not engineering equivalents. Availability, make, origin and documentation are confirmed at quotation.
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